Color Changeable Textile

ABSTRACT

A color changeable textile is formed by weaving a front yarn and a rear yarn. The front yarn forms plural front loops connected to each other. The rear yarn forms plural rear loops connected to each other. The rear yarn further coupled to a portion of the front loops to link the rear loops to the front loops. The color changeable textile shows the color of the front yarn at the front surface when there is no extra force applied to the color changeable textile. A part of the color changeable textile reveals the color of the rear yarn when the color changeable textile is stretched.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Taiwanese Application Serial Number 103136331, filed Oct. 21, 2014, which is herein incorporated by reference.

TECHNICAL FIELD

The present invention relates to a textile. More particularly, the present invention relates to a double-layer textile.

BACKGROUND

Textile products for use in the clothing industry and the processes for their manufacture are developing rapidly. Consumers expect clothing to provide functions more than keeping warming. Industries intend to combine the fabrics with different fields of techniques to obtain a value-added fabric with additional functions, so as to expand the usage field of the fabrics. For example, with the advance in the living quality of humans, demand for value-added and functional fabrics has kept raising, such as those capable of being antibacterial, absorbing moisture, repelling water, breathable, comfortable, and thermally insulative. There is a need to improve the fabricating efficiency and enlarge the range of applications for the functional fabric.

SUMMARY

The present invention provides a color changeable textile, which can show different colors and/or patterns after being stretched.

Embodiments of a first aspect of the invention are directed to a color changeable textile, which includes a front yarn forming a plurality of front loops, and a rear yarn forming a plurality of rear loops. In one or more embodiments, the front loops connect to each other thereby forming a front yarn layer, and the rear loops connect to each other thereby forming a rear yarn layer. In one or more embodiments, the rear yarn further couples to a part of the front loops for linking the front yarn layer and the rear yarn layer, an elongation of the front yarn is greater than that of the rear yarn, such that when there is no external force applied to the color changeable textile, the front loops are gathered and cover the rear yarn, and the color changeable textile shows the color of the front yarn. In one or more embodiments, when the color changeable textile is stretched, the front loops are deformed, and the rear yarn coupled to the front loops is revealed.

According to one or more embodiments of the present invention, the front yarn is a composite yarn having an elastic yarn blended with a base yarn.

According to one or more embodiments of the present invention, the ratio of the stretch ratio of the front yarn layer to the stretch ratio of the rear yarn layer is in a range from about 1.1 to about 4.

According to one or more embodiments of the present invention, the ratio of the stretch ratio of the front yarn layer to the stretch ratio of the rear yarn layer is in a range from about 1.1 to about 3.

According to one or more embodiments of the present invention, the ratio of the stretch ratio of the front yarn layer to the stretch ratio of the rear yarn layer is in a range from about 1.1 to about 2.

According to one or more embodiments of the present invention, a yarn diameter of the front yarn is not smaller than a yarn diameter of the rear yarn.

According to one or more embodiments of the present invention, each of the rear loops comprises one or more sinker loops, wherein at least one sinker loop of the rear loops becomes a transfer sinker loop and couples to the corresponding front loop.

According to one or more embodiments of the present invention, the transfer sinker loop goes the same knitting path as the front yarn goes at the front yarn layer, and the transfer sinker loop returns the rear yarn layer.

According to one or more embodiments of the present invention, the rear yarn is a light color yarn, and the front yarn is a dark color yarn.

According to one or more embodiments of the present invention, the rear yarn is a dark color yarn, and the front yarn is a light color yarn.

Embodiments of a second aspect of the invention are directed to a color changeable textile, which includes a front yarn forming a plurality of front loops, and a rear yarn forming a plurality of rear loops. In one or more embodiments, the front loops connect to each other thereby forming a front yarn layer. In one or more embodiments, the elongation of the front yarn is greater than that of the rear yarn, and the rear loops connect to each other thereby forming a rear yarn layer. In one or more embodiments, a part of the rear yarn goes from the rear yarn layer to an outside of the front yarn layer via a left down side of a sinker loop of the corresponding front loop, and the rear yarn goes upward and crosses a leg at a left side of the needle loop and returns an inner side of the front yarn layer; the rear yarn goes to the right side of a leg at the right side of the needle loop laterally; the rear yarn further goes to the outside of the front yarn layer at a right side of the leg at the right side of the needle loop, and the rear yarn goes downward and crosses the sinker loop and goes to the inner side of the front yarn layer through a space between the legs and returns the rear yarn layer.

According to one or more embodiments of the present invention, when there is no external force applied to the color changeable textile, the front loops are gathered and cover the rear yarn, and the color changeable textile shows the color of the front yarn; when the color changeable textile is stretched, the front loops are deformed, and the rear yarn coupled to the front loops is revealed.

According to one or more embodiments of the present invention, the front yarn is a composite yarn having an elastic yarn blended with a base yarn.

According to one or more embodiments of the present invention, a ratio of a stretch ratio of the front yarn layer to a stretch ratio of the rear yarn layer is in a range from about 1.1 to about 4.

According to one or more embodiments of the present invention, the ratio of the stretch ratio of the front yarn layer to the stretch ratio of the rear yarn layer is in a range from about 1.1 to about 3.

According to one or more embodiments of the present invention, the ratio of the stretch ratio of the front yarn layer to the stretch ratio of the rear yarn layer is in a range from about 1.1 to about 2.

In some embodiments, a yarn diameter of the front yarn is not smaller than a yarn diameter of the rear yarn.

According to one or more embodiments of the present invention, the rear yarn is a light color yarn, and the front yarn is a dark color yarn.

According to one or more embodiments of the present invention, the rear yarn is a dark color yarn, and the front yarn is a light color yarn.

It is to be understood that both the foregoing general description and the following detailed description are by examples, and are intended to provide further explanation of the invention as claimed.

The color changeable textile provided by the disclosure has a front yarn layer and a rear yarn layer. When there is no external force applied on the color changeable textile, the front yarn layer covers the rear yarn layer, and thus the color of the rear yarn is not revealed at the front yarn layer. When the color changeable textile is stretched and deformed, at least the stretched portion of the color changeable textile shows the color of the rear yarn. Therefore, the color changeable textile can provide more visual variations. Furthermore, the front loops and the rear loops are linked by the rear yarn without using an additional linking yarn. Therefore, the color changeable textile of the disclosure can provide better elasticity and stretching ability. The position and the ratio of the rear loops coupled to the front loops can be controlled thereby designing the color and/or pattern revealed by the color changeable textile when the color changeable textile is stretched.

BRIEF DESCRIPTION OF THE DRAWINGS

The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by Office upon request and payment of the necessary fee. The disclosure can be more fully understood by reading the following detailed description of the embodiment, with reference made to the accompanying drawings as follows.

FIG. 1 is a schematic front view of an embodiment of weaving the color changeable textile of the invention;

FIG. 2 is a schematic side view of an embodiment of weaving the color changeable textile of the invention;

FIG. 3 is a front view schematic diagram of an embodiment of the color changeable textile before the color changeable textile is stretched;

FIG. 4 is a front view schematic diagram of the embodiment of the color changeable textile after the color changeable textile is stretched;

FIG. 5 and FIG. 6 are front exploded schematic view and side exploded schematic view of another embodiment of the color changeable textile of the invention;

FIG. 7 is a front view schematic diagram of another embodiment of the color changeable textile before the color changeable textile is stretched;

FIG. 8 is a front view schematic diagram of another embodiment of the color changeable textile after the color changeable textile is stretched;

FIG. 9 is a front schematic view of yet another embodiment of the color changeable textile after being stretched; and

FIG. 10 and FIG. 11 are photographs of an embodiment of the color changeable textile before and after being stretched.

DETAILED DESCRIPTION

Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts. Furthermore, relative terms, such as “lower” or “bottom” and “upper” or “top”, may be used herein to describe one element's relationship to another element as illustrated in the Figures. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. For example, if the device in one of the figures is turned over, elements described as being on the “lower” side of other elements would then be oriented on “upper” sides of the other elements. The exemplary term “lower”, can therefore, encompasses both an orientation of “lower” and “upper”, depending of the particular orientation of the figure. Similarly, if the device in one of the figures is turned over, elements described as “below” or “beneath” other elements would then be oriented “above” the other elements. The exemplary terms “below” or “beneath” can, therefore, encompass both an orientation of above and below.

Since consumers expect functional clothing to provide more and more functions, such as antibacterial, keeping warming, absorbing moisture, repelling water, the appearance of the clothing is also required by the consumers. The present invention provides a color changeable textile, which has different colors at the front yarn layer and the rear yarn layer respectively. When there is no external force applied on the color changeable textile, the color changeable textile shows the color of the front yarn layer; when the color changeable textile is stretched, the color of the rear yarn layer (or a pattern) is revealed while the color changeable textile is viewed at the front side. Therefore, the color changeable textile provides better visual variety.

Reference is made to FIG. 1 and FIG. 2, in which FIG. 1 is a schematic front view of an embodiment of weaving the color changeable textile of the invention, and FIG. 2 is a schematic side view of the embodiment of weaving the color changeable textile of the invention. The color changeable textile 100 is formed by weaving two different yarns 200, 300. More particularly, the color, the elongation, and the diameter of the yarn 200 are different from that of the yarn 300. The yarns 200, 300 form a front yarn layer and a rear yarn layer, and the front yarn layer and the rear yarn layer construct the color changeable textile 100. In order to describe clearly, the yarn 200 at the front in FIG. 1 (e.g. at the left in FIG. 2) is called front yarn 200, and the yarn 300 at the rear in FIG. 1 (e.g. at the right in FIG. 2) is called rear yarn 300, in the following embodiments.

In the color changeable textile 100, the front yarn 200 forms a plurality of front loops 210, and the front loops 210 are connected to each other. The lateral front loops 210 (loops arranged in a course) are formed by the same front yarn 200 (filling yarn), and the lateral front loops 210 are arranged side by side. The vertical front loops 210 (loops arranged in a wale) are connected to each other thereby forming the front yarn layer. Each of the front loops 210 includes a needle loop 212, two legs 214, and a sinker loop 216, in which the legs 214 are the portions where two courses of front loops 210 connected to each other, and the needle loop 212 and the sinker loop 216 are connected to the upper side and lower side of the legs 214 respectively. Namely, the legs 214 at the upper course are connected by the needle loop 212 at the lower course, and the sinker loop 216 connects the adjacent legs 214. In this embodiment, the front loops 210 are arranged in a face loop manner, e.g., the legs 214 cover on the needle loop 216 at the front view.

The rear loops 310 are connected to each other thereby forming a rear yarn layer. Each of the rear loops 310 includes a needle loop 312, two legs 314, and a sinker loop 316 or a transfer sinker loop 318. The rear loops 310 are substantially arranged side by side in the course, and are connected to each other in the wale thereby forming the rear yarn layer. The distinguishing features between the front yarn layer and the rear yarn layer include: (1) the rear loops 310 are arranged in a back loop manner, e.g., the needle loop 312 covers the legs 314 at the front view; and (2) some sinker loops 316 formed by the rear yarn 300 go toward the front yarn layer and become the transfer sinker loops 318, in which the transfer sinker loops 318 are coupled to the legs 214 for linking the front and rear yarn layers. Thus, the front yarn layer formed by the front yarn 200 and the rear yarn layer formed by the rear yarn 300 are connected without any extra linking yarn.

With respect to the distinguishing feature (1), more particularly, the front yarn layer formed by the front yarn 200 and the rear yarn layer formed by the rear yarn 300 are corresponding arranged front and rear. Meanwhile, the needle loops 212 of the front loops 210 and the needle loops 312 of the rear loops 310 are arranged face to face at the adjacent inner sides of the yarn layers and are corresponding to each other.

With respect to the distinguishing feature (2), more particularly, the front loops 210 and the rear loops 310 are arranged in the same manner in course, but in a different manner in wale. Some of the sinker loops 316 have the elongated loop length and become transfer sinker loops 318. The transfer sinker loops 318 turn toward the front yarn layer and couple to the legs 214 of the front loops 210, such that the front yarn layer and the rear yarn layer are linked. In this embodiment, all of the sinker loops 316 of the rear loops 310 are utilized as the transfer sinker loops 318.

The transfer sinker loop 318 of the rear loop 310 is coupled to the legs 214 of the front loop 210 in a predetermined manner. For example, in this embodiment, the rear yarn 300 goes from the rear yarn layer to the outside, which is facing away from the rear yarn layer, of the front yarn layer via a left down side of the sinker loop 216 of the corresponding front loop 210; the rear yarn 300 goes upward and crosses the leg 214 at the left side of the needle loop 212 and returns the inner side, which is facing the rear yarn layer, of the front yarn layer; the rear yarn 300 goes to the right side of a leg at the right side of the needle loop 211 laterally; the rear yarn 300 further goes to the outside of the front yarn layer at the right side of the leg 214 at the right side of the needle loop 212; the rear yarn 300 goes downward and crosses the sinker loop 216 and goes to the inner side of the front yarn layer through the space between the legs 214 and returns the rear yarn layer.

Since the front yarn layer and the rear yarn layer are linked to each other by the rear yarn 300, an extra linking yarn utilized in a conventional fabricating process is no longer required in the present invention. More particularly, in the conventional double jersey fabricating process, the front yarn layer and the rear yarn layer are linked by a linking yarn, which is different from the front and rear yarns. The loop length of the linking yarn affects the property of the double jersey textile. For example, if the loop length of the linking yarn is too long or is elongated after being worn, the shape of the double jersey textile becomes loose; if the loop length of the linking yarn is too short, the stretch ability of the double jersey textile is restricted, such that the wearer may feel uncomfortable when the wearer exercises. However, the front yarn layer and the rear yarn layer are linked to each other by the rear yarn 300 in the present invention, therefore, the color changeable textile 100 is integrated, and the problem of textile loosening or lacking elasticity can be prevented.

In some embodiments, the front yarn 200 is a dark color yarn, and the rear yarn 300 is a light color yarn with a color lighter than the front yarn 200. The extension and the yarn diameter of the front yarn 200 are larger than that of the rear yarn 300. Therefore, when the color changeable textile 100 is fabricated and at a natural state, the front loops 210 and the rear loops 310 may gather because of the elongation of the front yarn 200 and the rear yarn 300. In some embodiments, the color of the front yarn 200 and the rear yarn 300 can be selected according to different design requirements. For example, the rear yarn 300 can be a dark color yarn since the front yarn 200 is a light color yarn. There is a color contrary between the front yarn 200 and the rear yarn 300.

Reference is now made to FIG. 3 and FIG. 4. FIG. 3 is a front view schematic diagram of an embodiment of the color changeable textile before the color changeable textile is stretched, and FIG. 4 is a front view schematic diagram of the embodiment of the color changeable textile after the color changeable textile is stretched. In FIG. 3, since the front yarn 200 has greater elongation and thicker yarn diameter, the gathering front loops 210 have a fluffy look and provide shielding ability. The portions where the rear yarn (not shown in FIG. 3) couples to the front loops 210 are shielded by the gathering front loops 210, thus the color changeable textile shows the color of the front yarn 200 at the front view before the color changeable textile is stretched.

As shown in FIG. 4, when the color changeable textile is stretched and deformed by an external force, the front yarn 200 and the rear yarn (not shown) are also stretched and deformed. Since the front yarn 200 has greater extension than the rear yarn 300, the front yarn layer formed by the front yarn 200 also has good extension. When the color changeable textile is stretched, the front yarn 200 becomes thin and tight rather than fluffy. Therefore, the gaps 215 are generated between the front loops 210. The gaps 215 provide spaces for revealing the color of the rear yarn. Namely, the color of the rear yarn is shown at the front surface of the color changeable textile when the color changeable textile is stretched. As a result, some portions at the front surface of the color changeable textile show the color of the rear yarn when the color changeable textile is stretched. Furthermore, some of the front loops 210 are coupled by the transfer sinker loops, thus the rear yarn coupled on the front loops 210 can be prevented from shifting and can stay at the initial position. Therefore, the transfer sinker loops formed by the rear yarn are revealed at the gap 215 when the front loops 210 are deformed.

Reference is made back to FIG. 1. The front yarn 200 can be a composite yarn in order to provide better stretch ability. For example, the front yarn 200 is formed by blending a base yarn with an elastic yarn. In some embodiments, the base yarn may be a Polyethylene terephthalate (PET) and the elastic yarn may be a spandex. The rear yarn 300 can be a PET yarn. Thus the elongation of the front yarn 200 is better than that of the rear yarn 300. More particularly, the ratio of a stretch ratio of the front yarn layer formed by the front yarn 200 to a stretch ratio of the rear yarn layer formed by the rear yarn 300 is in a range from about 1.1 to about 4. In some embodiments, the ratio of the stretch ratio of the front yarn layer to the stretch ratio of the rear yarn layer is in a range from about 1.1 to about 3, or in a range from about 1.1 to about 2. Accordingly, the yarn length of a rear loop 310 with a transfer sinker loop 318 is not greater than 1.5 times of the length of a corresponding front loop 210. By using the front yarn 200 with higher elongation, the rear yarn layer can be completely covered by the front yarn layer when there is no external force applied thereon. In some embodiments, the elastic yarn of the front yarn 200 is about 0.5 wt % to 35 wt %. In some embodiments, the elastic yarn of the front yarn 200 is about 2 wt % to 30 wt %, preferably is about 2 wt % to 20 wt %.

Furthermore, the yarn diameter of the front yarn 200 is not smaller than the yarn diameter of the rear yarn 300. In this embodiment, the front yarn 200 is thicker than the rear yarn 300. The color changeable textile 100 is formed by connecting the front loops 210 and the rear loops 310. The front loops 210 have loop gaps there between. If the size of the loop gaps is too big, the color or pattern of the rear yarn layer is shown at the front yarn layer via the loop gaps. Therefore, the size of the loop gaps can be reduced by enlarging the diameter of the front yarn 200. Since the loop gaps are filled by the front yarn 200 with larger diameter, the front yarn layer can provide better visual blocking ability, and the problem of grind through of a conventional double jersey textile can be prevented.

As described above, by properly selecting the color, the elongation, and the diameter of the front yarn 200 and the rear yarn 300, and using the weaving process disclosed in the embodiments, the color changeable textile 100 can show a color when the color changeable textile 100 is not deformed, and the color changeable textile 100 can show a different color or a different pattern when the color changeable textile 100 is stretched and deformed. The changing pattern of the color changeable textile 100 is discussed in FIG. 5 to FIG. 8.

FIG. 5 and FIG. 6 are a front exploded schematic view and a side exploded schematic view of another embodiment of the color changeable textile of the invention. The difference between this embodiment and the previous embodiment includes that not every sinker loop 316 is utilized as the transfer sinker loop 318, which is coupled to the front loop 210. Namely, the rear loops 310 at rear yarn layer couple to the front loops 120 in a skip stitch manner. For example, every one of three wales of the rear loops 310 do not couple to the front loops 210, since the other two of three wales of the rear loops 310 connect to the front loops 210. Details of the connection between the front loops 210 and the rear loops 310 are discussed in FIG. 1 and FIG. 2.

In this embodiment, the color changeable textile 100 is fabricated by the skip stitch manner. The front yarn 200 (see FIG. 5) has better elongation and thicker diameter, such that the front yarn 200 covers the rear yarn (see FIG. 5), and the color changeable textile 100 shows the color of the front yarn 200 when there is no external force applied on the color changeable textile 100, as shown in FIG. 7.

However, when the color changeable textile 100 is stretched and deformed, the portions of the rear loops coupled to the front loops reveal the color of the rear yarn, and the portions which are not coupled by the rear loops still show the color of the front loops. Therefore, the color changeable textile 100 may show stripe pattern, as shown in FIG. 8.

The pattern or the color revealed by the color changeable textile 100 when the color changeable textile 100 is stretched can be designed flexibly by changing the position and the ratio of the rear yarn coupling on the front yarn.

FIG. 9 is a front schematic view of yet another embodiment of the color changeable textile after being stretched. The present embodiment is a variation based on the embodiment shown in FIG. 5. For example, the rear loops are connected to the front loops in a skip stitch manner at lateral direction (in wale), and the connection portions are one-pitch switched in the vertical direction (in course). As a result, the pattern revealed when the color changeable textile 100 is stretched is a grid pattern formed by the front yarn 200 and the rear yarn 300 in different colors.

FIG. 10 and FIG. 11 are photographs of an embodiment of the color changeable textile before and after being stretched. In FIG. 10, the color changeable textile is at a natural state, i.e. there is no external force applied to the color changeable textile. The color changeable textile has a front yarn layer and a rear yarn layer, in which the front yarn layer is in a dark color (dark blue), and the rear yarn layer is in a light color (pink). When the color changeable textile is view at the front, the color changeable textile shows the color of the font layer, i.e. the rear yarn layer is covered by the front yarn layer and is not revealed. In FIG. 11, the color changeable textile is stretched and deformed. As shown in FIG. 11, at the portion of the stretched color changeable textile, the color of the rear yarn is revealed; at the portion of the non-stretched color changeable textile, the color changeable textile remains the color of the front yarn. The color and the pattern of the color changeable textile revealed when the color changeable textile is stretched can be designed by controlling the coupling portions of the rear loops and the front loops. More particularly, the light color portions at the stretched color changeable textile are the places where the rear loops couple to the front loops, and the dark color portions at the stretched color changeable textile are the places where the front loops are not coupled by the rear loops. Designers can select the color of the front yarn layer and the rear yarn layer. In most embodiments, a color contrast is made between the front yarn layer and the rear yarn layer.

The color changeable textile provided by the disclosure has the front yarn layer and the rear yarn layer. When there is no external force applied on the color changeable textile, the front yarn layer covers the rear yarn layer, and thus the color of the rear yarn is not revealed at the front yarn layer. When the color changeable textile is stretched and deformed, at least the stretched portion of the color changeable textile shows the color of the rear yarn. Therefore, the color changeable textile can provide more visual variations. Furthermore, the front yarn layer and the rear yarn layer are linked by the rear yarn without using an additional linking yarn. Therefore, the color changeable textile of the disclosure can provide better elasticity and stretching ability. The position and the ratio of the rear loops coupled to the front loops can be controlled thereby designing the color and/or pattern revealed by the color changeable textile when the color changeable textile is stretched.

Although the present invention has been described in considerable detail with reference to certain embodiments thereof, other embodiments are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein.

It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents. 

What is claimed is:
 1. A color changeable textile, comprising: a front yarn forming a plurality of front loops, wherein the front loops connect to each other thereby forming a front yarn layer; and a rear yarn forming a plurality of rear loops, wherein the rear loops connect to each other thereby forming a rear yarn layer, wherein the rear yarn further couples to a part of the front loops for linking the front yarn layer and the rear yarn layer, an elongation of the front yarn is greater than that of the rear yarn, such that when there is no external force applied to the color changeable textile, the front loops are gathered and cover the rear yarn, and the color changeable textile shows the color of the front yarn; when the color changeable textile is stretched, the front loops are deformed, and the rear yarn coupled to the front loops is revealed.
 2. The color changeable textile of claim 1, wherein the front yarn is a composite yarn comprising an elastic yarn blended with a base yarn.
 3. The color changeable textile of claim 1, wherein a ratio of a stretch ratio of the front yarn layer to a stretch ratio of the rear yarn layer is in a range from about 1.1 to about
 4. 4. The color changeable textile of claim 3, wherein the ratio of the stretch ratio of the front yarn layer to the stretch ratio of the rear yarn layer is in a range from about 1.1 to about
 3. 5. The color changeable textile of claim 4, wherein the ratio of the stretch ratio of the front yarn layer to the stretch ratio of the rear yarn layer is in a range from about 1.1 to about
 2. 6. The color changeable textile of claim 1, wherein a yarn diameter of the front yarn is not smaller than that of the rear yarn.
 7. The color changeable textile of claim 1, wherein each of the rear loops comprises one or more sinker loop, at least one sinker loop of the rear loops becomes a transfer sinker loop and couples to the corresponding front loop.
 8. The color changeable textile of claim 7, wherein the transfer sinker loop goes the same knitting path as the front yarn goes at the front yarn layer, and the transfer sinker loop returns the rear yarn layer.
 9. The color changeable textile of claim 1, wherein the rear yarn is a light color yarn, and the front yarn is a dark color yarn.
 10. The color changeable textile of claim 1, wherein the rear yarn is a dark color yarn, and the front yarn is a light color yarn.
 11. A color changeable textile, comprising: a front yarn forming a plurality of front loops, wherein the front loops connect to each other thereby forming a front yarn layer; and a rear yarn forming a plurality of rear loops, wherein an elongation of the front yarn is greater than that of the rear yarn, and the rear loops connect to each other thereby forming a rear yarn layer, wherein a part of the rear yarn goes from the rear yarn layer to an outside of the front yarn layer via a left down side of a sinker loop of the corresponding front loop, and the rear yarn goes upward and crosses a leg at a left side of the needle loop and returns an inner side of the front yarn layer; the rear yarn goes to the right side of a leg at the right side of the needle loop laterally; the rear yarn further goes to the outside of the front yarn layer at a right side of the leg at the right side of the needle loop, and the rear yarn goes downward and crosses the sinker loop and goes to the inner side of the front yarn layer through a space between the legs and returns the rear yarn layer.
 12. The color changeable textile of claim 11, wherein when there is no external force applied to the color changeable textile, the front loops are gathered and cover the rear yarn, and the color changeable textile shows the color of the front yarn; when the color changeable textile is stretched, the front loops are deformed, and the rear yarn coupled to the front loops is revealed.
 13. The color changeable textile of claim 11, wherein the front yarn is a composite yarn comprising an elastic yarn blended with a base yarn.
 14. The color changeable textile of claim 11, wherein a ratio of a stretch ratio of the front yarn layer to a stretch ratio of the rear yarn layer is in a range from about 1.1 to about
 4. 15. The color changeable textile of claim 14, wherein the ratio of the stretch ratio of the front yarn layer to the stretch ratio of the rear yarn layer is in a range from about 1.1 to about
 3. 16. The color changeable textile of claim 15, wherein the ratio of the stretch ratio of the front yarn layer to the stretch ratio of the rear yarn layer is in a range from about 1.1 to about
 2. 17. The color changeable textile of claim 11, wherein a yarn diameter of the front yarn is not smaller than that of the rear yarn.
 18. The color changeable textile of claim 11, wherein the rear yarn is a light color yarn, and the front yarn is a dark color yarn.
 19. The color changeable textile of claim 11, wherein the rear yarn is a dark color yarn, and the front yarn is a light color yarn. 